Help with Boolean Operators

Boolean logic is named after British mathematician George Boole (1815-1864) who
was instrumental in the field of symbolic logic. Terms are combined with the
words like and, or, and not to form logical statements.
Another British logician, John Venn, came up with a way to represent Boolean
logic graphically.

A and B

A or B

A not B

In many search engines, you can make use of logical operators to create advanced search statements.